Ignition device for engines



July 25 1939o B. svlsTouNoFF IGNITION DEVICE FOR ENGINES Filed Feb. 16, 1938 M u. 1, f rl a Y Patented July 25, 1939 UNITED r STATES PATENT oFFicE IGNITION DEVICE. FOR. ENGINES Boris Svstouno, Issy-les-Moulineaux, France Application February 16, 1938, Serial No. 190,773 In Luxemburg February 16, 1937 3 Claims.

It is known, in certain engines, to use for producing the ignition of the explosive mixture in each cylinder, a device comprising an element brought to incandescence by the passage of an electric current and kept at the required temperature by the heat supplied by the explosion and the gases in combustion.

The present invention relates to an ignition delyice of the above described type but in which he incandescent element is insulated from the side of the explosion chamber by an obturator submitted to the actionV of a spring adjusted in such a manner as to yield just as the compression of the explosive mixture reaches the required value. At that time the obturator driven by the compressed gases in turn compresses the spring and by being displaced, uncovers the incandescent element which coming in direct contact with the compressed gases brings about their ignition.

The setting of the advanced and retarded ignition, as well as the interruption thereof, are obtained by reducing or increasing the degree of compression of the spring operating the obturator.

The cleaning of the incandescent element is automatically insured by the alternating movement of the obturator. The-said movement insures the contact of the said element with the fresh gases and the ejection of the burnt gases from the free space or room where it is located.

vIn the accompanying drawing, given as eX- ample:

Figure 1 represents the ignition device with the incandescent element obturated.

Figure 2 shows the device ready for igniting.

Figure 3 is a plan view of an adjustment of the compression of the obturators spring.

Figure 4 shows the connection of several devices with a view to the simultaneous adjustment of the compression of the obturators spring.

In the bottom I of the device is tted an insulating body 2 provided with an axial channel running through the said body, through the Wall of which passes a conducting wire 3. The said wire carries the electric current to the incandescent element 4 connected to the earthin 5 and brings it to incandescence.

This ignition wire is, preferably, mounted on a support of insulating material which once brought to incandescence by the said wire,` Will keep the same at the required temperature for igniting the explosive gases during the working of the engine and without the help of any electric current.

The insulating body 2 is pressed against the lower part of the bottom I by means of a nut 6 which is recessed at its upper part and is continued by a lower tube which enters the axial channel of the said body 2.

In the said tube of nut slides the rod 'I of an obturator 8 provided with a valve I0 cooperating with the end of the said tube which forms a seat 9.

At its upper end, the rod 1 is provided with a washer II tightened by nuts I2. The said washer serves as a thrust for the obturator 8 during its downwards travel, under the action of the spring I3 covered with the cap It.

In normal time, the obturator 8-I0 occupies the position shown in Fig. 1, in which position the ignition wire 4 is insulated from the inside of the explosion chamber of the engine.

When compression reaches a certain predetermined value, the obturator rises (Fig. 2) and uncovers the ignition wire 4, the said wire causing the ignition of the gases. After the explosion, the spring I3 brings the obturator back to its iirst position (Fig. 1) and the cycle continues.

In practice the current is sent through the ignition wire only when theengine starts working. After a certain number of explosions, the said wire `insures the ignition by its own heat gathered duringr each explosion and preferably kept by the incandescence of its support.

The degree of compression of spring I3 is adjusted by means of its cap M controlled by a lift I rigidly joined to a governor I6 driven for instance by a connecting rod I8 serving for all the ignition devices of the engine.

An indicator I'I enables to check the operating of the device.. y

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. An ignition device for explosion or other engines, comprising a bottom, an ineandescence element inside the said bottom, an obturator shielding when at rest, said incandescent element; a spring acting upon said obturator and yielding the instant that the compression of the explosive mixture reaches the required value and after the explosion, bringing the said obturator back to its first position; and means for adjusting the degree of Compression of the spring, sov that the ignition may be advanced.

2. An ignition device for engines comprising a bottom, an ignition means comprising a resistance wire mounted on a support and maintaining incandescence during the working of the engine and Without the help of any electric current at the required temperature for igniting the eX- plosive gases; a spring obturator uncovering the ignition Wire at the time of compression and shielding the same after the explosion; and means for controlling the degree of compression of the spring of the obturator so as to vary at will the time of ignition and even to suppress the ignition.

3. An ignition device for engines comprising a bottom, an ignition means mounted in a bored insulating body and maintaining incandescence during the Working of the engine and Without the help 0f any electric current at the required temperature for igniting the explosive gases; a spring obturator moving freely in said bored insulating body as close as possible to the igniter in such a manner that its alternating movement ensures the scavenging of the burnt gases and the cleaning of the said igniter; said spring obturator uncovering the ignition means at the time of compression and shielding the same after the explosion; and means for controlling the compression of the spring of the obturator, so as to vary at will the time of and even to suppress the ignition.

BORIS SVISTOUNOFF. 

